Metal flashing



6, 1932. P. M. BURGESS 1,889,771

METAL FLASHING Filed Aug. 12, 1951 z? 1' A9 I. I

Patented Dec. 6, 1932 UNITED STATES PATENT ol-"rlca PEARL I. BURGESS, OF BEADIN G, MASSACHUSETTS, ASSIGNOB TO BURGESS & BLACHER 00., OF BOSTON, MASSACHUSETTS, A CORPORATION MASSACHUSETTS METAL FLASHING Application filed August 12, 1931. Serial No. 558,548.

This invention relates to metal fiashings adapted to be interposed between two courses of masonry and embedded in the usual bonding or bed of mortar between said courses, the form of the flashing being such that it cooperates with the mortar in providing a mechanical bond in every direction between the flashing and the courses of masonry.

The invention relates particularly to a flashing which is provided with dovetailshaped corrugations having narrow side walls extending from one longitudinal edge of theflashing to the other, some of said walls being inclined so that they extend diagonally across the layers of the masonry between which the flashing is interposed, and are non-parallel with other narrow side walls, this diagonal and non-parallel arrangement being recognized as an important factor in the. reduction of a mechanical bond in every direction between the flashing and the masonry.

Heretofore, so far as I am aware, each sheet metal section or unit of a flashing of this character has been provided with dovetail-shaped corrugations whose narrow walls, projectin from the flashing body, are, to a considera le extent, non-parallel with each other to provide a suificient number of diflerently inclined or obli ue walls.

I have found that t e operation of forming non-parallel side walls on a single flashing unit requires more time and is more expensive than is the case when said side walls are parallel with each other.

One object of my invention is to provide an oblong flashing having corrugated transverse zones extendmg crosswise of the flashing, each zone having dovetail-shaped ,cor-' rugations provided with inclined narrow side walls, extending obliquely crosswise of the flashing and projecting from opposite sides thereof, said walls being parallel with each other and adapted to be produced at a minimum expense, the oblique side walls of the corrugations of each transverse zone being inclined oppositely to those of the next zone, to provide a mechanical bond in all directions between the flashing and the masonry. Another object is to provide an oblong sheet metal flashing having a stifl longitudinal zone stiffened b corrugations extending from one longitu inal edge partly across the flashing, and a plain longitudinal zone, having all of the inherent flexibility of the sheet metal, extending from the stiff zone to the opposite longitudinal edge, the plain zone being without corrugations so that its flexibility mag be utilized as hereinafter set forth.

f the accompanying drawing forming a part of this specification,-

Figure 1 shows in perspective, a unit constituting a member or section of a sectional elongated flashing and adapted to be assembled with a duplicate unit or units to form a flashing of any desired len h.

igure 2 is a side View s owing two units assembled end to end.

Figure 3 is a section on line ure 2.

Figures 4 and 5 show in perspective a onepiece oblong flashing strip unit embodying the invention.

Figure 6 is a fragmentary pers ective view illustrating amode of using the ashing.

Figure is a fragmentary sectional view illustratin%a mode of use ofthe flashing shown by igure 5. 7

Figures 8, 9 and "10 are sectional views, showin different forms of the narrow side walls 0 the corrugations.

The same reference characters indicate the same arts in all of the figures.

A ashing of average length is preferably composed of a plurality of independently formed units.

The unit shown by Figure 1 is independently formed from sheet metal, preferably copper, and is substantially rectangular, and constitutes a transverse zone of an elongated flashing in which it is incorporated.

The unit has substantially parallel transverse meeting edges 12 and 13, determining the width of the flashing, and substantially parallellongitudinal edges 14, 14, collectively determining the length of the flashing when the units are assembled. The unit is rovided with dovetail-shaped corrugations avin narrow side walls 15, projecting from opposite sides ofthe unit and extending between the longitudinal edges 14. The walls we positely to, or in a different direction from,

those of the next unit, as shown by Figure 2. so that the flashing has a suflicient number of oppositely inclined edge walls 15 for all prac tical purposes, and may be made at a minimum cost.

The unit may be provided with any suitable means for securing it to another duplicate unit or units. As shown by Figure 3, each unit has a hooked seam flange 17 at one end, the flangeswof the units being interengaged.

Each flashing unit may be made of a single oblong piece, as shown by Figure 4, the length of the piece being such that it may include a plura ity of transverse zones, each zone being provided with dovetail-shaped corrugations having the narrow side walls 15, projecting from opposite sides of the zone and extending obliquely crosswise of the flashing, the walls 15 in each zone being parallel with each other and having an inclination opposite that of the Walls in the next zone. Figure shows an oblong sheet metal piece having a stiff longitudinal zone stiflened by corrugations extending from one longitudinal edge partly across the flashing, and a flexible longitudinal zone 19 without corrugations extending from the stifl zone to the opposite longitudinal ed e.

The zone 19 is adapte by its flexibility to be secured to a non-corrugated flexible supplemental flashing member 20 by a seam or joint indicated by 21 (Figure 7). The flashmg may be bent to form at one longitudinal edge thereof a longitudinal flange 23, across which the corrugations extend, said flange being adapted to overlap a rtion of a vertical wall surface, as shown y Figure 6, and confine against said surface a portion of an angular supplemental stri 24. The side walls 15 may be variously ormed, as shown by Figures 8, 9 and 10. The longitudinal zone 19 (Fig. 5) is also adapted by its flexibility to be easily bent at an angle to the stiff longitudinal zone to form a longitudinal flange arranged like the flange 23,- but without corrugations, the flange being compact and having only the thickness of the sheet metal.

I claim:

1. An oblong flashing having a plurality of transverse zones, each zone being provided with dovetail-shaped corrugations having narrow side Walls projecting from opposite sides of the zone and extending obliquely crosswise of the flashing, said walls in each zone being parallel with each other and havin the next zone.

2. An oblong flashing as specified by claim 1, said corrugations extending from one longitudinal edge of the flashing partly to the opposite ed e, so that one longitudinal edge portion of t e flashing is smooth or non-corrugated and is adapted to be seamed to a non-corrugated flexible member, constituting a su plemental longitudinal edge portion of the ashing.

3. A flashing composed of a plurality of rectangular sheet metal units, each having parallel transverse meeting edges determining the width of the flashing, and parallel longitudinal edges collectively determining the length of the flashing, each unit being provided with dovetail-shaped corrugations having narrow side walls projecting from opposite sides of the unit, and extending obliquely crosswise of the flashing, said walls being parallel with each other and inclined relative to the transverse edges, the units being adapted to be assembled to form a flashing in which the side walls of the corrugations of each unit are inclined oppositely to those of the next unit.

4. An oblong sheet metal flashing having a stiff longitudinal zone stiflened by corrugations extending from one longitudinal edge partly across the flashing, and a. flexible longitudinal zone without corrugations extending from the corrugated longitudinal zone to the opposite longitudinal edge, the flashing being adapted to be bent along the junction of the flexible zone with the stiffened zone, to convert the flexible zone into a flange arranged at an angle to the stiffened zone and having only the thickness of the sheet signature.

PEARL M. BURGESS. 

